/*
 * Created on 18-Feb-2005
 * Created by Paul Gardner
 * Copyright (C) Azureus Software, Inc, All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 */

package org.gudy.azureus2.pluginsimpl.local.ddb;

import org.gudy.azureus2.plugins.ddb.DistributedDatabaseContact;
import org.gudy.azureus2.plugins.ddb.DistributedDatabaseException;
import org.gudy.azureus2.plugins.ddb.DistributedDatabaseValue;

import com.aelitis.azureus.plugins.dht.DHTPlugin;

/**
 * @author parg
 * 
 */

public class DDBaseValueImpl implements DistributedDatabaseValue {
    private DDBaseContactImpl contact;

    private Object value;
    private byte[] value_bytes;

    private long creation_time;
    private long version;

    // we reserve 3 bytes for overflow marker and length encoding for multi-value values

    protected static int MAX_VALUE_SIZE = DHTPlugin.MAX_VALUE_SIZE - 3;

    protected DDBaseValueImpl(DDBaseContactImpl _contact, Object _value, long _creation_time, long _version)

    throws DistributedDatabaseException {
        contact = _contact;
        value = _value;
        creation_time = _creation_time;
        version = _version;

        value_bytes = DDBaseHelpers.encode(value);

        // don't police value size limit here as temporary large objects can be
        // created when handling transfers
    }

    protected DDBaseValueImpl(DDBaseContactImpl _contact, byte[] _value_bytes, long _creation_time, long _version) {
        contact = _contact;
        value_bytes = _value_bytes;
        creation_time = _creation_time;
        version = _version;
    }

    public Object getValue(Class c)

    throws DistributedDatabaseException {
        if (value == null) {

            value = DDBaseHelpers.decode(c, value_bytes);
        }

        return (value);
    }

    protected byte[] getBytes() {
        return (value_bytes);
    }

    public long getCreationTime() {
        return (creation_time);
    }

    public long getVersion() {
        return (version);
    }

    public DistributedDatabaseContact getContact() {
        return (contact);
    }
}
